mirror of
https://github.com/reactos/syzkaller.git
synced 2024-11-23 11:29:46 +00:00
2528093954
mknod on netbsd can now also accept a resource for the last arg. Fix that and add a test that will catch such things more reliably.
472 lines
11 KiB
Go
472 lines
11 KiB
Go
// Copyright 2015 syzkaller project authors. All rights reserved.
|
|
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
|
|
|
|
package prog
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"math/rand"
|
|
"strings"
|
|
"testing"
|
|
)
|
|
|
|
func TestGeneration(t *testing.T) {
|
|
target, rs, iters := initTest(t)
|
|
ct := target.DefaultChoiceTable()
|
|
for i := 0; i < iters; i++ {
|
|
target.Generate(rs, 20, ct)
|
|
}
|
|
}
|
|
|
|
func TestDefault(t *testing.T) {
|
|
target, _, _ := initTest(t)
|
|
ForeachType(target.Syscalls, func(typ Type, ctx TypeCtx) {
|
|
arg := typ.DefaultArg(ctx.Dir)
|
|
if !isDefault(arg) {
|
|
t.Errorf("default arg is not default: %s\ntype: %#v\narg: %#v",
|
|
typ, typ, arg)
|
|
}
|
|
})
|
|
}
|
|
|
|
func TestDefaultCallArgs(t *testing.T) {
|
|
testEachTarget(t, func(t *testing.T, target *Target) {
|
|
for _, meta := range target.SyscallMap {
|
|
if meta.Attrs.Disabled {
|
|
continue
|
|
}
|
|
// Ensure that we can restore all arguments of all calls.
|
|
prog := fmt.Sprintf("%v()", meta.Name)
|
|
p, err := target.Deserialize([]byte(prog), NonStrict)
|
|
if err != nil {
|
|
t.Fatalf("failed to restore default args in prog %q: %v", prog, err)
|
|
}
|
|
if len(p.Calls) != 1 || p.Calls[0].Meta.Name != meta.Name {
|
|
t.Fatalf("restored bad program from prog %q: %q", prog, p.Serialize())
|
|
}
|
|
s0 := string(p.Serialize())
|
|
p.sanitizeFix()
|
|
s1 := string(p.Serialize())
|
|
if s0 != s1 {
|
|
t.Fatalf("non-sanitized program or non-idempotent sanitize\nwas: %v\ngot: %v", s0, s1)
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
func testSerialize(t *testing.T, verbose bool) {
|
|
target, rs, iters := initTest(t)
|
|
ct := target.DefaultChoiceTable()
|
|
for i := 0; i < iters; i++ {
|
|
p := target.Generate(rs, 10, ct)
|
|
var data []byte
|
|
mode := NonStrict
|
|
if verbose {
|
|
data = p.SerializeVerbose()
|
|
mode = Strict
|
|
} else {
|
|
data = p.Serialize()
|
|
}
|
|
p1, err := target.Deserialize(data, mode)
|
|
if err != nil {
|
|
t.Fatalf("failed to deserialize program: %v\n%s", err, data)
|
|
}
|
|
if p1 == nil {
|
|
t.Fatalf("deserialized nil program:\n%s", data)
|
|
}
|
|
var data1 []byte
|
|
if verbose {
|
|
data1 = p1.SerializeVerbose()
|
|
} else {
|
|
data1 = p1.Serialize()
|
|
}
|
|
if len(p.Calls) != len(p1.Calls) {
|
|
t.Fatalf("different number of calls")
|
|
}
|
|
if !bytes.Equal(data, data1) {
|
|
t.Fatalf("program changed after serialize/deserialize\noriginal:\n%s\n\nnew:\n%s\n", data, data1)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestSerialize(t *testing.T) {
|
|
testSerialize(t, false)
|
|
}
|
|
|
|
func TestSerializeVerbose(t *testing.T) {
|
|
testSerialize(t, true)
|
|
}
|
|
|
|
func TestVmaType(t *testing.T) {
|
|
target, rs, iters := initRandomTargetTest(t, "test", "64")
|
|
ct := target.DefaultChoiceTable()
|
|
meta := target.SyscallMap["test$vma0"]
|
|
r := newRand(target, rs)
|
|
pageSize := target.PageSize
|
|
for i := 0; i < iters; i++ {
|
|
s := newState(target, ct, nil)
|
|
calls := r.generateParticularCall(s, meta)
|
|
c := calls[len(calls)-1]
|
|
if c.Meta.Name != "test$vma0" {
|
|
t.Fatalf("generated wrong call %v", c.Meta.Name)
|
|
}
|
|
if len(c.Args) != 6 {
|
|
t.Fatalf("generated wrong number of args %v", len(c.Args))
|
|
}
|
|
check := func(v, l Arg, min, max uint64) {
|
|
va, ok := v.(*PointerArg)
|
|
if !ok {
|
|
t.Fatalf("vma has bad type: %v", v)
|
|
}
|
|
la, ok := l.(*ConstArg)
|
|
if !ok {
|
|
t.Fatalf("len has bad type: %v", l)
|
|
}
|
|
if va.VmaSize < min || va.VmaSize > max {
|
|
t.Fatalf("vma has bad size: %v, want [%v-%v]",
|
|
va.VmaSize, min, max)
|
|
}
|
|
if la.Val < min || la.Val > max {
|
|
t.Fatalf("len has bad value: %v, want [%v-%v]",
|
|
la.Val, min, max)
|
|
}
|
|
}
|
|
check(c.Args[0], c.Args[1], 1*pageSize, 1e5*pageSize)
|
|
check(c.Args[2], c.Args[3], 5*pageSize, 5*pageSize)
|
|
check(c.Args[4], c.Args[5], 7*pageSize, 9*pageSize)
|
|
}
|
|
}
|
|
|
|
// TestCrossTarget ensures that a program serialized for one arch can be
|
|
// deserialized for another arch. This happens when managers exchange
|
|
// programs via hub.
|
|
func TestCrossTarget(t *testing.T) {
|
|
t.Parallel()
|
|
const OS = "linux"
|
|
var archs []string
|
|
for _, target := range AllTargets() {
|
|
if target.OS == OS {
|
|
archs = append(archs, target.Arch)
|
|
}
|
|
}
|
|
for _, arch := range archs {
|
|
target, err := GetTarget(OS, arch)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
var crossTargets []*Target
|
|
for _, crossArch := range archs {
|
|
if crossArch == arch {
|
|
continue
|
|
}
|
|
crossTarget, err := GetTarget(OS, crossArch)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
crossTargets = append(crossTargets, crossTarget)
|
|
}
|
|
t.Run(fmt.Sprintf("%v/%v", OS, arch), func(t *testing.T) {
|
|
t.Parallel()
|
|
testCrossTarget(t, target, crossTargets)
|
|
})
|
|
}
|
|
}
|
|
|
|
func testCrossTarget(t *testing.T, target *Target, crossTargets []*Target) {
|
|
ct := target.DefaultChoiceTable()
|
|
rs := randSource(t)
|
|
iters := 100
|
|
if testing.Short() {
|
|
iters /= 10
|
|
}
|
|
for i := 0; i < iters; i++ {
|
|
p := target.Generate(rs, 20, ct)
|
|
testCrossArchProg(t, p, crossTargets)
|
|
p, err := target.Deserialize(p.Serialize(), NonStrict)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
testCrossArchProg(t, p, crossTargets)
|
|
p.Mutate(rs, 20, ct, nil)
|
|
testCrossArchProg(t, p, crossTargets)
|
|
p, _ = Minimize(p, -1, false, func(*Prog, int) bool {
|
|
return rs.Int63()%2 == 0
|
|
})
|
|
testCrossArchProg(t, p, crossTargets)
|
|
}
|
|
}
|
|
|
|
func testCrossArchProg(t *testing.T, p *Prog, crossTargets []*Target) {
|
|
serialized := p.Serialize()
|
|
for _, crossTarget := range crossTargets {
|
|
_, err := crossTarget.Deserialize(serialized, NonStrict)
|
|
if err == nil || strings.Contains(err.Error(), "unknown syscall") {
|
|
continue
|
|
}
|
|
t.Fatalf("failed to deserialize for %v/%v: %v\n%s",
|
|
crossTarget.OS, crossTarget.Arch, err, serialized)
|
|
}
|
|
}
|
|
|
|
func TestSpecialStructs(t *testing.T) {
|
|
testEachTargetRandom(t, func(t *testing.T, target *Target, rs rand.Source, iters int) {
|
|
_ = target.GenerateAllSyzProg(rs)
|
|
ct := target.DefaultChoiceTable()
|
|
for special, gen := range target.SpecialTypes {
|
|
t.Run(special, func(t *testing.T) {
|
|
var typ Type
|
|
for i := 0; i < len(target.Syscalls) && typ == nil; i++ {
|
|
ForeachCallType(target.Syscalls[i], func(t Type, ctx TypeCtx) {
|
|
if ctx.Dir == DirOut {
|
|
return
|
|
}
|
|
if s, ok := t.(*StructType); ok && s.Name() == special {
|
|
typ = s
|
|
}
|
|
if s, ok := t.(*UnionType); ok && s.Name() == special {
|
|
typ = s
|
|
}
|
|
})
|
|
}
|
|
if typ == nil {
|
|
t.Fatal("can't find struct description")
|
|
}
|
|
g := &Gen{newRand(target, rs), newState(target, ct, nil)}
|
|
for i := 0; i < iters/len(target.SpecialTypes); i++ {
|
|
var arg Arg
|
|
for i := 0; i < 2; i++ {
|
|
arg, _ = gen(g, typ, DirInOut, arg)
|
|
if arg.Dir() != DirInOut {
|
|
t.Fatalf("got wrong arg dir %v", arg.Dir())
|
|
}
|
|
}
|
|
}
|
|
})
|
|
}
|
|
})
|
|
}
|
|
|
|
func TestEscapingPaths(t *testing.T) {
|
|
paths := map[string]bool{
|
|
"/": true,
|
|
"/\x00": true,
|
|
"/file/..": true,
|
|
"/file/../..": true,
|
|
"./..": true,
|
|
"..": true,
|
|
"file/../../file": true,
|
|
"../file": true,
|
|
"./file/../../file/file": true,
|
|
"": false,
|
|
".": false,
|
|
"file": false,
|
|
"./file": false,
|
|
"./file/..": false,
|
|
}
|
|
for path, want := range paths {
|
|
got := escapingFilename(path)
|
|
if got != want {
|
|
t.Errorf("path %q: got %v, want %v", path, got, want)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestFallbackSignal(t *testing.T) {
|
|
type desc struct {
|
|
prog string
|
|
info []CallInfo
|
|
}
|
|
tests := []desc{
|
|
// Test restored errno values and that non-executed syscalls don't get fallback signal.
|
|
{
|
|
`
|
|
fallback$0()
|
|
fallback$0()
|
|
fallback$0()
|
|
`,
|
|
[]CallInfo{
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 0,
|
|
Signal: make([]uint32, 1),
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 42,
|
|
Signal: make([]uint32, 1),
|
|
},
|
|
{},
|
|
},
|
|
},
|
|
// Test different cases of argument-dependent signal and that unsuccessful calls don't get it.
|
|
{
|
|
`
|
|
r0 = fallback$0()
|
|
fallback$1(r0)
|
|
fallback$1(r0)
|
|
fallback$1(0xffffffffffffffff)
|
|
fallback$1(0x0)
|
|
fallback$1(0x0)
|
|
`,
|
|
[]CallInfo{
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 0,
|
|
Signal: make([]uint32, 1),
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 1,
|
|
Signal: make([]uint32, 1),
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 0,
|
|
Signal: make([]uint32, 2),
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 0,
|
|
Signal: make([]uint32, 1),
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 0,
|
|
Signal: make([]uint32, 2),
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 2,
|
|
Signal: make([]uint32, 1),
|
|
},
|
|
},
|
|
},
|
|
// Test that calls get no signal after a successful seccomp.
|
|
{
|
|
`
|
|
fallback$0()
|
|
fallback$0()
|
|
breaks_returns()
|
|
fallback$0()
|
|
breaks_returns()
|
|
fallback$0()
|
|
fallback$0()
|
|
`,
|
|
[]CallInfo{
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 0,
|
|
Signal: make([]uint32, 1),
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 0,
|
|
Signal: make([]uint32, 1),
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 1,
|
|
Signal: make([]uint32, 1),
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 0,
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 0,
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
},
|
|
},
|
|
},
|
|
{
|
|
`
|
|
fallback$0()
|
|
breaks_returns()
|
|
fallback$0()
|
|
breaks_returns()
|
|
fallback$0()
|
|
`,
|
|
[]CallInfo{
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 0,
|
|
Signal: make([]uint32, 1),
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 1,
|
|
Signal: make([]uint32, 1),
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 0,
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
Errno: 0,
|
|
},
|
|
{
|
|
Flags: CallExecuted,
|
|
},
|
|
},
|
|
},
|
|
}
|
|
target, err := GetTarget("test", "64")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
for i, test := range tests {
|
|
t.Run(fmt.Sprint(i), func(t *testing.T) {
|
|
p, err := target.Deserialize([]byte(test.prog), Strict)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if len(p.Calls) != len(test.info) {
|
|
t.Fatalf("call=%v info=%v", len(p.Calls), len(test.info))
|
|
}
|
|
wantSignal := make([]int, len(test.info))
|
|
for i := range test.info {
|
|
wantSignal[i] = len(test.info[i].Signal)
|
|
test.info[i].Signal = nil
|
|
}
|
|
p.FallbackSignal(test.info)
|
|
for i := range test.info {
|
|
if len(test.info[i].Signal) != wantSignal[i] {
|
|
t.Errorf("call %v: signal=%v want=%v", i, len(test.info[i].Signal), wantSignal[i])
|
|
}
|
|
for _, sig := range test.info[i].Signal {
|
|
call, errno := DecodeFallbackSignal(sig)
|
|
if call != p.Calls[i].Meta.ID {
|
|
t.Errorf("call %v: sig=%x id=%v want=%v", i, sig, call, p.Calls[i].Meta.ID)
|
|
}
|
|
if errno != test.info[i].Errno {
|
|
t.Errorf("call %v: sig=%x errno=%v want=%v", i, sig, errno, test.info[i].Errno)
|
|
}
|
|
}
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestSanitizeRandom(t *testing.T) {
|
|
testEachTargetRandom(t, func(t *testing.T, target *Target, rs rand.Source, iters int) {
|
|
ct := target.DefaultChoiceTable()
|
|
for i := 0; i < iters; i++ {
|
|
p := target.Generate(rs, 10, ct)
|
|
s0 := string(p.Serialize())
|
|
p.sanitizeFix()
|
|
s1 := string(p.Serialize())
|
|
if s0 != s1 {
|
|
t.Fatalf("non-sanitized program or non-idempotent sanitize\nwas: %v\ngot: %v", s0, s1)
|
|
}
|
|
}
|
|
})
|
|
}
|